FLAC: Buffer overflow

1. Gentoo Linux Security Advisory

Advisory Reference	GLSA 200711-15 / flac
Release Date	November 12, 2007
Latest Revision	November 12, 2007: 01
Impact	normal
Exploitable	remote

Package	Vulnerable versions	Unaffected versions	Architecture(s)
media-libs/flac	< 1.2.1-r1	>= 1.2.1-r1	All supported architectures

Related bugreports: #195700

Synopsis

Multiple integer overflow vulnerabilities were found in FLAC possibly allowing for the execution of arbitrary code.

2. Impact Information

Background

The Xiph.org Free Lossless Audio Codec (FLAC) library is the reference implementation of the FLAC audio file format. It contains encoders and decoders in library and executable form.

Description

Sean de Regge reported multiple integer overflows when processing FLAC media files that could lead to improper memory allocations resulting in heap-based buffer overflows.

Impact

A remote attacker could entice a user to open a specially crafted FLAC file or network stream with an application using FLAC. This might lead to the execution of arbitrary code with privileges of the user playing the file.

3. Resolution Information

Workaround

There is no known workaround at this time.

Resolution

All FLAC users should upgrade to the latest version:

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/flac-1.2.1-r1"

You should also run revdep-rebuild to rebuild any packages that depend on older versions of FLAC:

Code Listing 3.2: Resolution

# revdep-rebuild --library=libFLAC.*

4. References

CVE-2007-4619

Page updated November 12, 2007

Summary: This is a Gentoo Linux Security Advisory

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